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java.awt.HeadlessException: 	at sun.awt.HeadlessToolkit.getBestCursorSize(HeadlessToolkit.java:233)	at org.icepdf.ri.common.views.DocumentViewControllerImpl.getViewCursor(DocumentViewControllerImpl.java:877)	at org.icepdf.ri.common.views.DocumentViewControllerImpl.setViewCursor(DocumentViewControllerImpl.java:842)	at org.icepdf.ri.common.SwingController.setDisplayTool(SwingController.java:1253)	at org.icepdf.ri.common.SwingController.openDocument(SwingController.java:1532)	at org.icepdf.core.pobjects.Document.getPageSearchImage(Document.java:1058)	at org.icepdf.examples.jsf.viewer.view.DocumentState.getPageImage(DocumentState.java:258)	at org.icepdf.examples.jsf.viewer.view.DocumentManager.getCurrentPageImage(DocumentManager.java:435)	at org.icepdf.examples.jsf.viewer.servlet.PdfRenderer.doGet(PdfRenderer.java:83)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)	at java.lang.Thread.run(Thread.java:619)